Home / 13,759.07-18,987.72-7,790.57

Finding the Fourth Proportional to 13,759.07, 18,987.72 and 7,790.57

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Solution

The fourth proportional to 13,759.07, 18,987.72 and 7,790.57 is: 10,751.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.07 : 18,987.72 = 7,790.57 : x
  2. Step 2: Convert to fraction form
    13,759.07/18,987.72 = 7,790.57/x
  3. Step 3: Cross multiply
    13,759.07x = 18,987.72 × 7,790.57
  4. Step 4: Simplify right side
    13,759.07x = 147,925,161.80
  5. Step 5: Solve for x
    x = 147,925,161.80/13,759.07
  6. Step 6: Final answer
    x = 10,751.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.